Bhikkhuni Ordination as mentioned earlier requires dual ordinations,
that is, a woman is first ordained by the bhikkhuni Sangha then
bhikkhu Sangha. Because the bhikkhuni Sangha never came to Thailand
hence there is neither bhikkhuni ordination nor bhikkhuni Sangha.

The Sukhothai
period, 12th to 13th century, has been considered the golden
age of Buddhism. Both men and women were seen practising Buddhism,
observing precepts. The king not only practised Buddhism himself
but was learned enough to give preaching on every full moon
day. During the 417 years of Ayudhya, the following period,
where the Thai capital shifted south to Ayudhya, Thailand went
through difficult time. There was constant warfare both with
invaders and among the mighty powers within the country. The
disturbing social context was not an ideal seat for either Buddhist
learning or practice.

There were
fewer people interested to study Buddhism. The immediate concern
of leading day-to-day life took its precedence. It is unthinkable
that women would have ample time to think of practising Buddhism
enough to commit themselves to ordained life.

From a comparative
study we find one common factor responsible for the ordination
of women: it is that women are committed to Buddhism deeply
enough to inspire them to think of leading an ordained life.
This is true in Sri Lanka, China, Korea, and Japan, but in Thailand,
Thai women do not yet have that opportunity.